Don't be a fool, Coach Richard. Stay put in Dallas. You're about to be promoted to D-Coordinator. The Cowboys are a very talented and young team, perfect for you to hone your D-Coordinator skills for the next 4-5 years. Plus, Jerry will pay you handsomely in order to make sure you stay in Big D for the next several years.
The New York Jets or any other team seeking a new head coach are a big mess and very likely with much older rosters. It would be a headache trying to rebuild them when you've got no head coaching, much less a coordinator experience. Stay put for now Coach Richard and help this team win a couple of Super Bowls while gaining coordinator experience and padding up your resume for a much more lucrative future head coach deal whether in Dallas or elsewhere. It's the smart thing to do.